Scroll to the bottom and tap Blocked Contacts (labeled as Blocked on older iOS versions).
The exact steps vary depending on whether you use an Apple iPhone, a Google Android device, a Samsung smartphone, or a landline network. How to Unblock a Number on Apple iPhone (iOS) how do you unblock a number
Alternatively: Go to > Phone > Blocked Contacts . Swipe left on a number to unblock it. 🤖 On Android (Google/Samsung) Open the Phone app. Tap the three dots (⋮) or "More" in the corner. Select Settings > Blocked numbers . Scroll to the bottom and tap Blocked Contacts